Repeating device for phonographs



Sept; 29, 1925. 1,555,083

L. A. SINK REPEATING DEVICE FOR PHONOGRAFHS Filed Sept. 14. 1923 I'BY I 2,"

ATTORNEY.

Patented Sept. 29, 1925.

PATENT OFFICE.

LYnroan ALBERT sum, or HIGHLAND PAIR-K, MICHIGAN.

REP EATING DEVICE FOR PHONOGRAPHS.

Application filed September 14, 1923. Serial No. 662,606.

To all whom. it may concern:

Be it known that I, LYNFORD ALBERT SINK, a citizen of the United States, and residing at Highland Park, countyof Wayne, and State of Michigan, have invented a new and Improved Repeating Device for Phonographs, of which the following is a specification.

This invention relates to repeating devices for phonographs and the object ofthe invention is to provide a device by which a record may be automatically repeated as often as desired.

Another object of the invention is to provide a device which will lift the reproducing portion of the phonograph at the end of the record and will automatically carry it to the outer edge of the record where the.

needle of the phonograph is again inserted in the sound groove of the record.

A further objectof the invention is to provide a device of the character described which may be set for different sized records and will reproduce the record as long as the record is rotatedby the phonograph motor. 1 A. further object of the invention is to provide a means for inserting in the sound groove of the record each time the record is repeated without dropping the needle suddenly onto the record and thus injuring the sound groove.

Another object of the invention is to provide a device of-the character described in which the record itself provides the motive power for moving the reproducing portion of the phonograph.

The above and other objects will be apparent from the following description wherein reference is made to the accompanying drawings illustrating a preferred embodiment of my invention. 1

In the drawings Fig. 1 is a perspective View of the device as attached to a phonograph.

Fig. 2 is an elevation of the device showing the tone arm of the phonograph in section.

Fig. 3 is a section through the device in the operating position.

Similar numerals refer to similar parts throughout the several views.

As shown in Fig. 1 the phonograph is provided with a tone arm 1, which'is rotatably mounted in a socket 2. This tone arm 1 at the end is provided with a,reproducing member 3 including a diaphragm and needle 4 which is the usual construction. This needle dis adapted to ride in the sound groove of a record 5 which is positioned on a turn table 6 rotated by the spring motor of the phonograph as will be readily understood.

A member 7 shown in Fig. 2 is secured on the portion 8, of the phonograph by the screws 9 and this member 7 is provided with an arcuate portion 10 extending over the phonograph record. A stop 11 is secured to the. arcuate portion 10 by the set screw 12, and a stop 18 is also secured to the arcuate portion 10 by the set screw 14.

Supported on the stop 13 is a dash pot 15 having a plunger 16 therein and a light spring 17 which tends to force the plunger 16 upwardly, the plunger 16 being provided with an upwardly extending end 18 for a purpose hereinafter described and the dash pct 15 is filled with oil on which the plunger 16 is supported. f l

A member 19. is secured to thetone arm 1 by means of the cap 20 and the screws 21 and this member 19 is' provided with a vertical recess 22; containing a coiled spring 23.

A member 24 is slidable vertically in the recess 22 and is provided with a slot 25 through which a cam member 26 is movable. Within said slot, the member 24 is provided with a roller 27 riding on the cam face 28 of the member 26 and by lateral movement of the member 26 the member 24 may be raised or lowered vertically, the spring 23 tending to move the member24c to its lowermost positions.

The'member 24 at the lower end is provided with a bifurcated end 29 in which a roller 30 is rotatably mounted and the roller 30 is provided with a rubber tread for contacting the surface of the record 5. This roller 3O is set at an angle to the axis of the tone arm so that the rotation of the record while the roller is in contact therewith will feed the members 24: and 19 and tone arm 1 to the outer edge of the record to the position shown in Fig. 1.

To operate the devic the cam member 26 is set in the position shown in Fig. 2 with the roller 27 riding on the high part of the cam 28 which holds the member 24 and roller 30 in its uppermost position against the tension of the spring 23. At this time the needle 4 is inserted in the sound groove of the record and supports the tone arm 1 so that the roller 30 is held above the surface of the record 5 as shown in Fig. 2. e

As the music is reproduced the needle 4 travels towards the center of the record and the end 31 of the cam member 26 strikes the stop 11 which moves the member 26 to the right so that the roller 27 travels downwardly into the lowest part of the cam face 28. The spring 23 forces the member 24 and roller 3O downward into contact with the surface of the record 5 at this time thus raising the reproducing member 3' and needle 4 from "the surface of the record and due to the angleof the roller 30 and rotation of the record 5 the members 24 and 19 and tone arm 1 are moved to the right to the outer edge of the record.

As these portions move to the outer edge of the record the ei1d82 of the member 26 strikes the stop 13 thus forcing the member 26 inwardly and causing the roller 27 to travel up the cam face 28 which raises the member 24 and roller 30 and allows the end 38 of the member 26 to rest on the extending end 18 of the plunger 16.

The weight of the parts at this time forces the plunger 16 downwardly slowly until the weight is relieved by the needle 4 again entering the sound groove of the record, which is accomplished slowly and with ease and will not mar the surface of the record.

At this time the tone arm and parts traveling in the sound groove move to the left toward the center of the record thus withdrawing the end 33 of the member 26 from the upper end of the plunger 16. At thistime the spring 17 returns the plunger 16 to the position shown in Fig. 3 for the next operation, the tension of the spring 17 being insufficient to support the weight ofthe tone arm and parts secured thereto while the spring 33 has sufficient tension to support these parts. By this construction the record will be repeated as long as the record continues to rotate.

From the foregoing description it becomes evident that the device is very simple and efficient in operation, will not easily get out of order, operates automatically and provides a device which accomplishes the objects described.

While it will be apparent that the illus trated embodiment of my invention herein disclosed is well calculated to adequately fulfill the objects and advantages primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope of the subjoined claims.

Having thus described my invention, I claim v 1. In a repeating device, the combination with a phonograph tone arm, stylus, and record, of a support mounted for bodily vertical movement upon the tone arm, engage able in a lowered position with the record to lift said arm sufliciently to disengage the stylus from the record, and a slide carried by the tone arm, having a cam engagement with saidsupport, and movable hori- Zontally to shift said support, vertically.

2. In a repeating device, the combination with a phonograph tone arm, stylus, and I record, of a support for the tone arm vertically slidable upon said arm between positions in one of which said support clears the record and in the other of which its engagement with the record lifts the tone arm sufliu ciently to disengage the stylus from the record, a spring urging said support to one of said positions and a horizontally movable slide carried by the tone arm adapted in one position to maintain the support in the V I other of said positions.

3. In a repeating device, the combination with a phonograph tone arm, stylus, and record, of a support ifor'said arm, vertically slidable upon the latter, between a raised position clearing the record and a lowered position, bearing upon the record, said support in the latter position lifting said arm sufficiently to disengage the stylus from the record, a spring urging said support downwardly, anda slide carried by the tone arm, having cam engagement with said support for raisingthe latter.

4. In a repeating device, the combination with a phonograph tone arm, stylus, and record, of a bracket mounted upon said arm, a rod mounted to slide in said bracket in a substantially vertical, direction, a spring carried by said bracket urging the rod downwardly, a roller carried by the lower end of said rod for engagement with the record, and a cam member slidable in said bracket substantially horizontally and engageable with said rod to raise the latter, said member having an actuating end projecting from the bracket.

5. In a repeating device, the combination with a phonograph tone-arm, stylus, and record, of a stop adapted to limit outward swinging of the tone-arm, and a dash-pot carried by said'stop for retarding lowering record, of means carriedby said tone-arm 3 coacting with the record to raise said arm in a predetermined limiting position of its inward travel, and further coacting with the record to carry the tone-arm Outward responsive to rotation of the record, a stop for limiting outward travel of the tone-arm and for initiating a downward movement of said stop for retarding the lowering of the tone- 10 arm.

In witness whereof I hereunto set my hand.

LYNFORD ALBERT SINK. 

